Fire arch



l;491,243 Apnl 22 192.4 a i v M. P K

FIRE ARCH ii D 15. 1920 s Sheets-Sheet 1 ,April 22 1924. 1 1,491,243:

, M. LIPTAK FIRE ARCH Filed Dec. 15, 1920 3 Sheets-She 2' A ril 22 1924.

1,491,243 M. LIPTAK.

FIRE ARCH Filed Dec. 15, 1920 5 Sheet-Sheet 3 lift Fatenited Apr. 22, 1924..-

UNHED STATES PATENT 'OFFlCE.

MICHAEL LIP'I'AK, OF ST. iPAUL, MINNESOTA, ASSIGNOR T LIFT ASK FIRE BRICK ARCH (30., OF MINNEAPOLIS, MINNESOTA, A CORPCBATION OF MINNESOTA,

rrnn anon.

Application filed December 15, 1920. Serial 1%. 431,036;

To all whom it may concern:

Be it known that I, MICHAEL LIPTAK, citizen of the United States, residing at St. Paul, in the county of .Ramsey and State of Minnesota, have invented certain new and useful Improvements in Fire Arches; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable otiiers skilled in the art to which it appertains to make and use the same.

My present invention relates to furnaces such as used in connection with boilers in steam generating plants, in steel plants, in glass factories, and various other places, and is directed particularly to the provision of an improved fire arch structure therefor.

The present invention is in the nature of an improvement on or modification of the fire arch disclosed and claimed in my pending application Serial Number 419,973, filed October 27, 1920, and it involves highly important novel features which make the present arch a very decided improvement over said earlier form. In said earlier form of the arch, as a decided improvement over the art then. known, the blocks of the arch were detachably and individually supported, so that, from a broad point of view, they were independently replaceable, but no means was disclosed whereby this replacement could be made from the top of the arch or from the exterior of the furnace.

My present invention provides extremely simple and efiicient construction which makes it not only possible but an easy matter to independently replace defective or burned away blocks, by inserting the new blocks through the arch from the top thereof or from that side of the arch that is not exposed to the flames. This is highly important because it makes it possible and practicable to repair furnace arches without putting out the fire and, in fact, without disturbing the fire.

The present improved arch is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a fragmentary perspective showing the improved arch:

Fig. 2 is a perspective showing two of the buli-nose or corner-forming blocks of the are Fig. 3 is a fragmentary longitudinal section of the arch;

Fig. 4 is a front or inner end elevation of the arch, some parts being in transverse segtion some of the corner blocks being omit-' te Fig. 5 is a bottom plan view showing a portion of the arch;

Fig.6 is a perspective showing the form of arch block that may be primarily used in first building the arch;

Fig. 7 is a view corresponding to Fig. 6, but showing the two-section block that is used in making replacements;

Fig. 8 is a fragmentary transverse section showing the two-part or sectional blocks, such as illustrated in Fig. 7 ap plied in the arch;

Fig. 9 is abottom plan view showing an arch, the body of whlch is made up of the two-part or sectional blocks;

Fig. 10 is a view in perspective corresponding to Fig. 7, but illustrating a still,

further modified form of arch-forming block;

Fig. 11 is a view corresponding to Fig. 3, but showing an arch having the blocks illustrated in Fig. 10 incorporated therein; and

Fig. 12 is a transverse vertical section showing a portion of the arch illustrated in Fig. 11, some parts being broken away.

The preferred construction illustrated in Figs. 1 to 9, inclusive, will first be described. The tire arch is supported from the trans verse main beams 13, as shown three in number, and preferably in the form of I-beams, the ends of which are imbedded in the masonry side walls 14. Slidably hung on the lower flanges of the main beam 13 are beam hangers 15 having inturned upper prongs that embrace the lower flanges of said beams, and having T-shaped channels in their lower portions formed by laterally spaced flanges with inwardly projecting opposing bearing bosses 16.

The beam hangers 15 are aligned on the beams 18 have outstandin 'ing the full length thereo The preferred form of arch-forming block for use in first constructing the arch, is shown in detail in Fig. 6 and it comprises a body portion 19 .and a flanged head 19*. The body 19 is rectangular in form and, at one side thereof, the flanged head 19 projects laterally, while at the other side, said body projects far beyond the adjacent flange of said head, but leaves an undercut shoulder at 19. The flanged head of this block is wide enou h to span the space between adjacent supp emental beams 18' and to rest upon the lower flanges thereof. The lateral dimension of ofi'set side will underlie one of the supportshown in Fig. 6, the underlying ing beams and will be aligned approximately with the far edge of the overlying beam.- Blocks of the kind just described are adapted to be readily slid on thebeams 18, to proper positions in the first construction or erection of the arch, but are not adapted to be used in replacing defective blocks without removing adjacent blocks,

because they cannot be inserted downward through the arch from the top thereof.

The block shown in detail in Fig. 7 is of the same construction as that shown in Fig. 6, except that it is made in two parts 19 and 19 by splitting or dividing said block at 19', and this divided block is especially adapted for use in replacing defective or burned away blocks. In this divided block, the widest section 19 is narrow enough to pass between the flanged beams 18 and, hence, may be placed in position and hung on the flange of a beam 18, first by a downward, then by a lateral movement, which latter movement will place the offset side of the block under the beam and the shoulder 19 on the flange of the beam.

Then, when the block section '19 is forced downward to position best shown in Fi s. 1.. and 8, its flan ed head will rest on t a lower flange of t e other supportin beam 18 and the two block sections will 51811 .be assembled vexg much the same as if they were a single lock, and both block sections will be interlocked to the supportin beams.

Of course, before one or more of t ese two section blocks can be applied as described to replace a defective block ofthe character block or blocks 19 must first be driven t rough the arch and downward into'the furnace. All these operations may be easily performed by a person'working on or above the arch. In Fig. 1, one of the arch blocks is left out and may be assumed to have been driven down through the arch. The arch shown in Fig.1 is illustrated as made up chiefly of the one-piece block 19, but in several instances, the two-piece blocks 19"19 are shown as applied in the arch. Of course, the entire arch, or substantially the entire body portion thereof,-may be made up entirely of the two-piece or sectional block.

In the preferredmanner of applying the arch blocks, the offset sides thereof are alternately projected in adjacent rows, that is, the blocks of one transverse row'will be projected toward the right, the next toward the left, the next toward the right, and soforth, so as to produce ofi'sets or broken lines in the joints between the blocks in a direction longitudinally of the arch or in the direction in which the flames move in contact with the arch. the body portion 19 is such that when the block is hung on the beams 18, as stated, its

In the construction illustrated, the supplemental beams 18 are made in sections and connected by telescoped flanges and socket arms 20, which latter have T-shaped longitudinal channels and are preferably formed as inner end extensions of the respective beam sections.

At the inner ends of the inner sections of the beams 18 are detachable beam tips 21 that have the same general cross section as the beams and have end flanges that are slid into the socket arms 20 of the inner beam sections.

These beam tips 21- support metallic crown plates 22, on which an apron wall 23 is built. The apron wall is thus supported in a position abovethe top of the blocks 19, so that the latter may, when desired, be slid on the beams either to or from working positions.

To finish the inner end of the arch and form what is generally known as bull-nose I provide corner blocks 24, (see Figs. 1 and 2). These blocks 24 are arranged to fit in pairs between the beam tips and are formed in my prior application above identified, but

differs therefrom in the fact that it is made up of two sections, adapting the block to be placed in position from the to of the arch or, in other words, from t e relatively cold side thereof. This form of block comprises a body or main section 25 and a sup lemental section 26, said sections, respective y, having undercut heads 25 and 26.

The body 25 is offset at one side from its head 25, so that the offset portion will underlie one of the beams 18.. In the other directions, the heads 25 and 26 are narrower than the body sections, so that flat hanger bars 27 can be inserted in position under said heads while their ends are resting on the lower flanges of the beams 18, (see Figs. 11 and 12). These views, Figs. 11 and 12, show how the blocks 2526 are independently hung from the beams 18. It is evident that when the han er bar 27 is slid out from under the heads of the block sections 25 and 26, the latsemb ed, form a composite block, the width of which equals the distance between supporting beams 18 measured from center to center of beams. The transverse width of the block-sections 19 and 25 is slightly less than the distance between the flanged lower portions of the beams 18, so that said block sections will ass freely between the beams. As preferably constructed and shown, the

I block sections 19 and 26 are of approximately the same width as the lower flangesof the beams 18. When the block sections are hung in osition, the offset side of the block section 1 or 25, as the case may be, is approximately vertically aligned with the far ange edge of one of the supporting beams and the block section19 or 26, as the case 'may be, will be approximatelv vertically aligned with the near flange edge of the other supporting beam. With this arrangement, therefore, the block sections 19 and 26 may be moved vertically to or from working position, by an operator at the top of the arch, for the reason that it has no part that underlies any beam or any block section and therefore acts as a sort of a key or retaining block.

The advantages of being able to repair furnace arches or the like by an operator at the top or cold side thereof are, of course, very great, but are so obvious to those familiar with the subject that no extended comment is here deemed necessary.

What I claim is:

1." A fire arch comprising laterally spaced beams and arch-forming blocks hung from said beams and having body portions that are laterally offset so that one side is approximately vertically aligned with the far edge of one of said supporting beams and the other side of said block is approximately vertically aligned with the near edge of the other supporting beam, said blocks having head flanges that overlap and directly engage the two adjacent supporting beams, the joints between said end blocksbeing staggered or offset in respect to the joints between the adjacent arch-forming blocks.

'2. The structure defined in claim 1 in which the blocks in adjacent transverse rows have their ofiset portions alternated so as to form broken or offset joints.

In testimony whereof I aflix my signature. MICHAEL LIPTAK. 

